High temperature adaptability of NTN bearings

Source: Bearing network time: 2013-02-03

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The high temperature adaptability of NTN bearings, the heat treatment process of NTN bearings with an outer diameter of less than 240mm ensures that it is stable at temperatures below 150 degrees. For example, operating temperatures above 150 degrees require unique heat treatment; such NTN bearings are suffixed S1 to S4 ( DIN 623) symbol.
S1: Maximum operating temperature 200 degrees S2: Maximum operating temperature 250 degrees S3: Maximum operating temperature 300 degrees S4: Maximum operating temperature 350 degrees NTN bearings with an outer diameter greater than 240mm usually maintain a stable scale below 200 degrees.
NTN bearings are made of glass fiber reinforced nylon 66; suitable for operating conditions where the operating temperature does not exceed 120 degrees; this NTN bearing uses oil when smooth; if the oil contains additives; can lead to shortened service life of the cage. When the temperature exceeds 120 degrees, the aging smooth oil will also shorten the life of the cage. Therefore, it is necessary to investigate and replace the smooth oil on schedule.
The allowable temperature of a sealed NTN bearing also depends on the life of the smooth grease filled between it and the need for a touch seal.
The sealed NTN bearing is smoothed with a uniquely tested high quality lithium-based smooth grease. This smooth grease can accept a high temperature of 120 degrees for a short period of time. If the operating temperature reaches 70 degrees or higher, the life of the lithium-based smooth grease is regulated. The number will be shortened.
To work frequently at high temperatures, it is necessary to use a unique smooth grease; and also pay attention to the need to use heat-resistant materials as a sealing device. The operating temperature of the standard touch seal can not exceed 110 degrees.
If the high-temperature composition data is used for sealing; then it is necessary to think that this very useful fluorination data will emit harmful gas and smoke when it exceeds 300 degrees. The unique feature is to use the welding torch when disassembling the NTN bearing; at this point.

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